EP 0716919 A3 19961227 - UV-protected multilayered panels
Title (en)
UV-protected multilayered panels
Title (de)
UV-geschütze, mehrschichtige Polycarbonatplatten
Title (fr)
Panneaux multicouches à base de polycarbonate protégés contre le rayonnement UV
Publication
Application
Priority
DE 4444868 A 19941216
Abstract (en)
[origin: EP0716919A2] UV-stabilised, multilayer polycarbonate sheet (I) contains 1.1 a base sheet made of thermoplastic polycarbonate (PC) contg. no UV absorber or from 0 to 1 wt.% UV absorber, with a viscosity of 500-2500 Pa.s at 280 deg.C and a shear rate of 100 s<-1> and, on at least one side, 1.2 an outer layer of thermoplastic PC contg. 2-20 wt.% UV absorber (II), with a viscosity (under the above conditions) of 200-2300 Pa.s, which is at least 50 Pa.s lower than the viscosity of 1.1. Also claimed is a process for the prodn. of (I) by co-extrusion, by combining the melts for the core material and the outer layer(s) with the aid of a coextrusion adaptor and extruding the combination into the required form in a closed die.
IPC 1-7
IPC 8 full level
B32B 27/18 (2006.01); B29C 48/07 (2019.01); B29C 48/21 (2019.01); B29C 48/49 (2019.01); B32B 7/02 (2019.01); B32B 27/36 (2006.01); B32B 37/00 (2006.01); B32B 37/15 (2006.01); C08K 5/00 (2006.01); B29K 69/00 (2006.01); B29L 9/00 (2006.01)
CPC (source: EP KR US)
B29C 48/07 (2019.02 - EP US); B29C 48/18 (2019.02 - KR); B29C 48/21 (2019.02 - EP US); B29C 48/307 (2019.02 - EP US); B29C 48/49 (2019.02 - EP US); B29C 48/914 (2019.02 - EP US); B32B 7/02 (2013.01 - EP US); B32B 27/08 (2013.01 - US); B32B 27/18 (2013.01 - KR US); B32B 27/36 (2013.01 - EP KR US); B32B 27/365 (2013.01 - US); C08K 5/3475 (2013.01 - EP US); B29C 48/022 (2019.02 - EP US); B29C 48/08 (2019.02 - EP US); B29C 48/90 (2019.02 - EP US); B29C 2793/009 (2013.01 - EP US); B29K 2069/00 (2013.01 - EP US); B29K 2105/256 (2013.01 - EP US); B32B 2307/71 (2013.01 - US); Y10S 428/913 (2013.01 - EP US); Y10T 428/31507 (2015.04 - EP US)
C-Set (source: EP US)
Citation (search report)
- [A] EP 0320632 A2 19890621 - BAYER AG [DE]
- [DY] EP 0110221 A2 19840613 - ROEHM GMBH [DE]
- [Y] EP 0599208 A1 19940601 - ROEHM GMBH [DE]
- [A] EP 0338355 A1 19891025 - MOBAY CORP [US]
- [A] EP 0569878 A2 19931118 - ROEHM GMBH [DE]
- [PY] EP 0683192 A2 19951122 - BAYER AG [DE]
- [A] EP 0359622 A1 19900321 - KAYSERSBERG PACKAGING SA [FR]
- [X] DATABASE WPI Week 9414, Derwent World Patents Index; AN 94-114870, XP002012346
- [A] DATABASE WPI Week 9414, Derwent World Patents Index; AN 94-114864, XP002012347
- [A] DATABASE WPI Week 9415, Derwent World Patents Index; AN 94-123846, XP002012348
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
EP 0716919 A2 19960619; EP 0716919 A3 19961227; EP 0716919 B1 20020612; AT E218973 T1 20020615; DE 4444868 A1 19960620; DE 59510241 D1 20020718; ES 2178661 T3 20030101; IL 116389 A0 19960331; IL 116389 A 19980405; JP 3606977 B2 20050105; JP H08224848 A 19960903; KR 100361786 B1 20030315; KR 960021528 A 19960718; US 5846659 A 19981208
DOCDB simple family (application)
EP 95119063 A 19951204; AT 95119063 T 19951204; DE 4444868 A 19941216; DE 59510241 T 19951204; ES 95119063 T 19951204; IL 11638995 A 19951214; JP 34538695 A 19951211; KR 19950050398 A 19951215; US 56898995 A 19951207